React State Hooks Explained Simply

Day 12–13 of my 30 Days Job-Ready Challenge Built a Todo App in React. It looks simple, but learned a lot while building it: Why we should not mutate state directly Difference between map() and filter() and where to use them Event bubbling (delete click was marking task complete 😅) Using localStorage to persist data The main learning was not coding. It was thinking before writing code. What state is needed? What should be its type? What happens on different user actions? Clear logic >>> writing code fast. Discipline builds consistency. #100DaysOfCode #ReactJS #Frontend #WebDevelopment #JavaScript #LearningInPublic

If you're learning JavaScript, the event loop probably felt like magic (or a nightmare) the first time you heard about it. You read the docs. You watched the videos. But something still didn't click. That's exactly why I built JSLens 🔍 JSLens is a free web app that visually breaks down how JavaScript actually works under the hood: → The Event Loop → Call Stack → Web APIs → Callback Queue → Microtasks & Macrotasks Instead of imagining the flow in your head, you can see it - step by step, in real time. No setup. No installations. Just open it and start learning. If you're a JS beginner (or someone who just wants a refresher), this one's for you. 🔗 Try JSLens here: https://jslens.web.app Would love to hear what you think - drop a comment or DM me! 🙌 #JavaScript #WebDevelopment #JSLens #LearnToCode #EventLoop #Frontend #OpenSource #BuildInPublic

🚀 Built a Simple React Form with Controlled Components Today I practiced building a simple form in React using useState and a single handleChange function. 🔹 Managed multiple inputs (text + checkbox) using one state object 🔹 Used dynamic updates with name attribute 🔹 Handled checkbox with checked and other inputs with value 🔹 Implemented form submission using preventDefault() 🔹 Reset form fields after submission 💡 Key takeaway: “Use one state and one function to manage the entire form efficiently.” This helped me better understand how React handles form data and state updates in a clean and scalable way. #ReactJS #WebDevelopment #Frontend #JavaScript #Learning #CodingJourney

🚀 Master React Router in Minutes! Here’s a simple breakdown of everything you need to know: ✅ What is Routing ✅ SPA Concept ✅ Static vs Dynamic Routes ✅ useParams() ✅ Protected Routes 💡 Key Takeaways: React uses SPA (Single Page Application) Routing helps display components based on URL Dynamic routes make apps scalable Protected routes secure your app 📌 If you're learning React, this is a must-know concept! Let me know in comments 👇 What topic should I cover next? #React #WebDevelopment #Frontend #JavaScript #ReactJS #Coding #LearnToCode

⚛️ Common React Mistakes That Are Killing Your Performance 💀 You think your React code is fine… . But these small mistakes are silently breaking your app 👀 Here’s what most developers still do wrong 👇 . ❌ Mutating state directly React won’t re-render properly (page 2)  ❌ Using index as key Leads to weird UI bugs when list updates (page 3)  ❌ Too much global state Unnecessary re-renders & messy logic (page 4)  ❌ useEffect misuse Missing dependency array = infinite loop 🔁 (page 5)  ❌ Storing derived state You’re duplicating logic for no reason (page 6)  ❌ Too many re-renders New objects/functions every render = performance drop (page 7)  ❌ Ignoring loading & error states Your UI breaks when API fails (page 8)  ❌ Poor folder structure Good code needs good organization (page 9)  . 🔥 React isn’t hard… Bad practices make it hard 💬 Clean code = scalable apps 📌 Save this before your next project . More Details Visit: https://lnkd.in/gRVwXCtq Call: 9985396677 | info@ashokit.in. . #ReactJS #Frontend #WebDevelopment #JavaScript #Coding #Developers #Programming #SoftwareEngineering

If you're learning React and still confused about hooks… You're not alone. 👉 A lot of people know how to use hooks, but not when to use them. And that’s where things start going wrong. Here are 5 React hooks that actually matter 👇 🔹 useState Manages component state and triggers re-render when data changes. Used in almost every app , but overusing it can make your logic messy. 🔹 useEffect Handles side effects like API calls and external updates. Most misused hook , bad dependencies = bugs + performance issues. 🔹 useRef Stores values without causing re-renders and accesses DOM directly. Super useful for focus control, timers, and tracking previous values. 🔹 useContext Removes prop drilling by sharing data across components. Great for global state , but don’t treat it like a full state manager. 🔹 useNavigate Controls navigation programmatically inside your app. Commonly used for redirects after login, logout, or form actions. --- Here’s the truth 👇 React isn’t hard. Bad understanding of hooks is. Stop memorizing. Start building. 💬 Which hook confused you the most when you started? #ReactJS #FrontendDeveloper #JavaScript #MERNStack #WebDevelopment #Coding #LearnInPublic

Why does React feel complicated? It’s not because it’s hard. It’s because we over-optimize everything. With React, devs start thinking about performance too early: - memo everywhere - useCallback everywhere - global state for things that don’t need it Now the code is harder to read, harder to debug, and ironically… not faster. Most apps don’t need that level of optimization. They need clarity. React becomes simple again when you stop trying to be clever. Write straightforward components. Let it re-render. Optimize only when something is actually slow. React isn’t complicated. Overengineering is. #reactjs #javascript #webdevelopment #frontend #softwareengineering #programming

What Actually Triggers a Re-render in React? If you’re learning React, you’ve probably heard the term “re-render” a lot. But what actually causes a component to re-render? Let’s break it down in the simplest way possible ❓ What is a Re-render? A re-render happens when React updates a component and re-executes its function to reflect new data. In simple terms: React runs your component function again and updates the UI if needed. 1. State Changes (useState) The most common trigger. Whenever state changes, React re-renders the component. Clicking the button updates count, which triggers a re-render. 2. Props Changes If a parent component passes new props, the child re-renders. When count changes in the parent, Child re-renders. 3. Parent Re-render Even if props don’t change, a child may still re-render when its parent does. When Parent re-renders, Child re-renders too (by default). 4. Context Changes If you’re using React Context: When the context value changes, all consuming components re-render. 5. Force Update (Rare) You can manually force a re-render, but it’s rarely needed and generally discouraged. ❓ What Does NOT Trigger a Re-render? Understanding this is just as important: Updating a normal variable Changing a ref (useRef) Mutating state directly without setState ⭐ Bonus: How to Prevent Unnecessary Re-renders? Use React.memo Use useMemo and useCallback Keep components small and focused Final Thoughts React re-renders are not random they happen for specific reasons: State changes Props changes Parent re-renders Context updates Once you understand this, debugging React apps becomes much easier. 📖 Blog Post: https://lnkd.in/dwzHn9VJ #ReactJS #React #FrontendDevelopment #WebDevelopment #JavaScript #Frontend #Coding #Programming #SoftwareDevelopment #WebDev

when I first started React I was so confused about useState and useEffect like what is the difference and when do I use which one so let me explain both with one simple real example 👇 imagine you are building a weather app that fetches weather data when the page loads here is how useState and useEffect work together in that const [weather, setWeather] = useState(null) useEffect(() => {  fetch('https://lnkd.in/g7JkAAtU')   .then(res => res.json())   .then(data => setWeather(data)) }, []) that is it. two hooks. one job each. useState stores the weather data useEffect fetches it when the component loads simple way to remember it 👇 useState = where you keep your data useEffect = where you do something when something happens when I understood this everything in React started making sense if you are just starting React and feeling confused about these two, save this post. you will need it 🙌 anything else in React that confused you when you started? drop it in the comments 👇 #React #JavaScript #Frontend #WebDev #ReactJS #100DaysOfCode #Programming #LearnToCode

🚀 React Hooks: From Beginner to Advanced Hooks changed the way we build React apps by making code cleaner, reusable, and easier to manage. From useState for managing state, to useEffect for side effects, useRef for persistent values, and advanced hooks like useMemo, useCallback, and useReducer — mastering hooks is a game changer for every frontend developer. 💡 Key lessons: ✅ Reuse logic with custom hooks ✅ Think in data flow ✅ Optimize only when needed ✅ Keep building real projects The more you practice hooks, the more natural React development becomes. What’s your favorite React Hook and why? 👇 #React #JavaScript #WebDevelopment #Frontend #Programming #ReactJS #Coding #SoftwareDevelopment #100DaysOfCode